688816382 has 8 divisors (see below), whose sum is σ = 1033371216. Its totient is φ = 344359312.

The previous prime is 688816379. The next prime is 688816399. The reversal of 688816382 is 283618886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×688816382² = 948936016223139848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 688816382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3098 + ... + 37245.

It is an arithmetic number, because the mean of its divisors is an integer number (129171402).

Almost surely, 2^688816382 is an apocalyptic number.

688816382 is a deficient number, since it is larger than the sum of its proper divisors (344554834).

688816382 is a wasteful number, since it uses less digits than its factorization.

688816382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48882.

The product of its digits is 884736, while the sum is 50.

The square root of 688816382 is about 26245.3116194112. The cubic root of 688816382 is about 883.1500322002.

The spelling of 688816382 in words is "six hundred eighty-eight million, eight hundred sixteen thousand, three hundred eighty-two".